import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/index")
public class indexServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession(false);
        if (session == null) {
            resp.setContentType("text/html; charset=utf8");
            resp.getWriter().write("用户还未登陆");
            return;
        }
        String username = (String) session.getAttribute("username");
        if (username == null) {
            resp.setContentType("text/html; charset=utf8");
            resp.getWriter().write("当前用户未登录!");
            return;
        }
        resp.setContentType("text/html; charset=utf8");
        resp.getWriter().write("欢迎你! " + username);
    }
}
